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Submission #69997

# Submission time Handle Problem Language Result Execution time Memory
69997 2018-08-22T08:13:30 Z 3zp parentrises (BOI18_parentrises) C++14
100 / 100
 225 ms 13332 KB 
#include<bits/stdc++.h>
using namespace std;
int f[2000009];
int dp[2][609][609];
int ans[309];
int mod = 1e9+7;
main(){
    int P;
    cin >> P;
    if(P == 1){
        int t;
        cin >> t;

        while(t--){
            string s, ans = "";
            cin >> s;
            int a = 0, b = 0, fl = 0;
            for(int i = 0; i < s.size(); i++){
                if(s[i] == '(') a++;
                else b++;
            }
            if(a > 2 * b || b > 2 * a){
                cout << "impossible"<<endl;
                continue;
            }
            if(a > b){
                fl = 1;
                swap(a, b);
                reverse(s.begin(), s.end());
                for(int i = 0; i < s.size(); i++)
                    if(s[i] == '(') s[i] = ')';
                else s[i] = '(';
            }
            int k =  b - a;
            vector<int> X, Y;
            for(int i = 0; i < s.size(); i++){
                f[i] = 0;
                if(s[i] == '(') X.push_back(i);

            else Y.push_back(i);
            }
            for(int i = 0; i < k; i++)
                f[X[i]] = 1;
            int x = k, y = Y.size()-1;
            int A = 0, B = 0;
            while(x < X.size() && y >= 0 && X[x] < Y[y])
                f[X[x]] = 1, f[Y[y]] = 1, x++, y--;
            for(int i = 0; i < s.size(); i++){
                if(s[i] == '('){

                    if(f[i]) A++,B++,ans+='G';
                    else if(A < B) A++,ans+='R';
                    else B++, ans += 'B';
                }
                else{
                    if(f[i]) A--,B--, ans+='G';
                    else {if(A > B) A--, ans+='R';
                    else B--,ans+='B';
                    }
                }
                if(A < 0 ||  B < 0) fl = 2;
            }
            if(fl == 2) cout <<"impossible"<<endl;
            else {if (fl) reverse(ans.begin(), ans.end());
            cout<<ans<<endl;}
        }
    }
    else{

        dp[0][0][0] = 1;
        for(int i = 0; i <= 300; i++){
            int d = i % 2;
            int d1 = (i + 1) %2;
            for(int l = 0; l <= 600; l++)
                for(int r = l; r <= 600; r++)
                    dp[d1][l][r] = 0;
            for(int l = 0; l <= 600; l++)
                for(int r = l; r <= 600; r++){
                    dp[d1][max(0, l-2)][r - 1] += dp[d][l][r];
                    dp[d1][l + 1][r + 2] += dp[d][l][r];
                    if(dp[d1][max(0, l - 2)][r - 1] >= mod)
                        dp[d1][max(0, l - 2)][r - 1] -= mod;
                    if(dp[d1][l + 1][r + 2] >= mod)
                        dp[d1][l + 1][r + 2] -= mod;
                }
            for(int j = 0;  j <= 600; j++)
                ans[i] = (ans[i] + dp[d][0][j])% mod;
        }
        int t;
        cin >> t;
        while(t--){
            int N;
            cin >> N;
            cout << ans[N]<<endl;
        }
    }
}

Compilation message

parentrises.cpp:7:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
parentrises.cpp: In function 'int main()':
parentrises.cpp:18:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int i = 0; i < s.size(); i++){
                            ~~^~~~~~~~~~
parentrises.cpp:30:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 for(int i = 0; i < s.size(); i++)
                                ~~^~~~~~~~~~
parentrises.cpp:36:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int i = 0; i < s.size(); i++){
                            ~~^~~~~~~~~~
parentrises.cpp:46:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             while(x < X.size() && y >= 0 && X[x] < Y[y])
                   ~~^~~~~~~~~~
parentrises.cpp:48:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int i = 0; i < s.size(); i++){
                            ~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 2 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 2 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 596 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 596 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 3 ms 596 KB Output is correct
7 Correct 3 ms 596 KB Output is correct
8 Correct 3 ms 596 KB Output is correct
9 Correct 3 ms 596 KB Output is correct
10 Correct 2 ms 596 KB Output is correct

Subtask #4
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 596 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 3 ms 596 KB Output is correct
7 Correct 3 ms 596 KB Output is correct
8 Correct 3 ms 596 KB Output is correct
9 Correct 3 ms 596 KB Output is correct
10 Correct 2 ms 596 KB Output is correct
11 Correct 4 ms 596 KB Output is correct
12 Correct 4 ms 672 KB Output is correct
13 Correct 3 ms 672 KB Output is correct
14 Correct 4 ms 744 KB Output is correct
15 Correct 5 ms 796 KB Output is correct
16 Correct 29 ms 796 KB Output is correct
17 Correct 10 ms 1812 KB Output is correct
18 Correct 15 ms 1812 KB Output is correct
19 Correct 13 ms 1812 KB Output is correct
20 Correct 12 ms 1832 KB Output is correct
21 Correct 225 ms 1832 KB Output is correct
22 Correct 98 ms 13328 KB Output is correct
23 Correct 79 ms 13328 KB Output is correct
24 Correct 73 ms 13328 KB Output is correct
25 Correct 99 ms 13332 KB Output is correct

Subtask #5
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 193 ms 13332 KB Output is correct

Subtask #6
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 193 ms 13332 KB Output is correct
2 Correct 203 ms 13332 KB Output is correct

Subtask #7
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 193 ms 13332 KB Output is correct
2 Correct 203 ms 13332 KB Output is correct
3 Correct 176 ms 13332 KB Output is correct